a fixed amount of money paid to somebody each year, usually for the rest of their life 年金（常为养老金） She receives a small annuity. 她每年得到一笔微薄的年金。
a type of insurance that pays a fixed amount of money to somebody each year 年金保险 income from pensions, annuities and trusts 养老金、年金和信托收入
Word Originlate Middle English: from French annuité, from medieval Latin annuitas, from Latin annuus ‘yearly’, from annus ‘year’.